Blender system with rotatable blade assembly

ABSTRACT

A blender system includes a container having a rotatable blade assembly therein, a lid covering an open end of the container, and a base with a motorized unit. When the container is coupled with the base, the motorized unit is adapted to drive rotation of the rotatable blade assembly. The lid includes a hinged actuator lever adapted to actuate the motorized unit. A detent extends from the hinged actuator lever and passes through a series of apertures and presses against a slidable actuator shaft disposed in the container and maintained in its position by a spring force, thereby depressing a switch for the motorized unit. A rotatable blade system includes cutting blade(s) and crushing blade(s). The crushing blade extends longitudinally outwardly from a hub. When the hub rotates in a first direction or second direction opposite the first direction, a face of the crushing blade is leading or trailing, respectively.

RELATED APPLICATIONS

This application claims priority to, and the benefit of, U.S.provisional application No. 61/511,614, filed Jul. 26, 2011, for allsubject matter common to both applications. This application also claimspriority to, and the benefit of, U.S. provisional application No.61/526,398, filed Aug. 23, 2011, for all subject matter common to bothapplications. The disclosures of said provisional applications arehereby incorporated by reference herein.

FIELD OF THE INVENTION

The present invention relates to blender systems adapted to process foodproducts. More particularly, the present invention provides a blendersystem having a container, a lid, and a motorized base capable of beingactuated by a user by way of the lid, and additionally to a rotatableblade assembly having both a plurality of cutting blades and at leastone crushing blade.

BACKGROUND OF THE INVENTION

Blenders are commonly used to process a plurality of different foodproducts, including liquids, solids, semi-solids, gels, and the like. Itwell-known that blenders are useful devices for blending, cutting, anddicing food products in a wide variety of commercial settings, includinghome kitchen use, professional restaurant or food services use, andlarge-scale industrial use. They offer a convenient alternative tochopping or dicing by hand, and often come with a range of operationalsettings and modes adapted to provide specific types or amounts of foodprocessing, e.g., as catered to particular food products.

Conventional blenders include one or more blades disposed in a bottomportion of a container. Rotational motion of the blades is driven by amotor housed in a base of the blender. In most conventional blenders, auser is enabled to actuate the motor by turning a knob disposed on anexterior face of base or pressing a button disposed on an exterior faceof the base. This design, however, can require a user to repeatedlypress one or more buttons or turn the knob multiple times to achievepulsed operation of the motor. These types of actions tend to be lessconvenient and intuitive for users. Moreover, the placement of suchknobs or buttons solely on an exterior face of the base can beinconvenient for users and can result in a user repeatedly moving backand forth between the base and the lid to repeatedly check the contentsof the blender to determine if additional processing of the food isnecessary.

Furthermore, typical blenders utilize cutting blades that areinsufficient for performing as diverse a range of food processingoperations as may be desired by users. In particular, cutting bladestend to chop food very finely without providing a mechanism foradequately crushing other food items, such as for example, ice. Those ofskill in the art will appreciate that many conventional blenders fail atcrushing ice at a suitably fast rate (e.g., at a rate that is the sameas or comparable to the rate at which non-ice ingredients beingprocessed are cut).

SUMMARY

Accordingly, there is a need for blender systems adapted with handlingabilities and mechanisms for actuating the motor. Furthermore, there isa need for blender systems providing more robust cutting and crushingcapabilities. The present invention is directed toward solutions toaddress these and other needs, in addition to having other desirablecharacteristics that will be appreciated by one of skill in the art uponreading the present specification.

In accordance with an example embodiment of the present invention, ablade assembly for a blender can include a hub having a central axisabout which the blade assembly rotates. A plurality of cutting bladescan extend radially outwardly from the hub, each of the cutting bladeshaving a sharp cutting edge, a blunt spine edge, and a cutting bladeface therebetween. At least one crushing blade can extend longitudinallyoutwardly from the hub, the at least one crushing blade having a firstedge, a second edge, and a crushing blade face therebetween. Theplurality of cutting blades can be oriented in such a way as to causethe sharp cutting edge of each blade to be a leading surface and theblunt spine edge to be a trailing surface when the hub rotates in afirst direction, and the blunt spine edge of each blade to be a leadingsurface and the sharp cutting edge to be a trailing surface when the hubrotates in a second direction opposite the first direction. The at leastone crushing blade can be oriented in such a way as to cause thecrushing blade face to be a leading surface when the hub rotates in afirst direction and a trailing surface when the hub rotates in a seconddirection.

In accordance with aspects of the present invention, for each of theplurality of cutting blades, the sharp cutting edge can be sharper thanthe blunt spine edge. The sharp cutting edge of a first of the pluralityof cutting blades can have a first radius of curvature and the sharpcutting edge of a second of the plurality of cutting blades has a secondradius of curvature. The second radius of curvature can be smaller thanthe first radius of curvature. The sharp cutting edge of a third of theplurality of cutting blades can have a third radius of curvature and thesharp cutting edge of a fourth of the plurality of cutting blades canhave a fourth radius of curvature. The fourth radius of curvature can besmaller than the third radius of curvature. The blade assembly can beoperable to crush food products with the leading surface of the at leastone crushing blade when the hub rotates about the central axis. When thehub is rotating in a first direction, the leading surface of at leastone of the plurality of cutting blades can be the sharp cutting edge andthe leading surface of the at least one crushing blade can be thecrushing blade face. When the hub is rotating in a first direction, theleading surface of at least one of the plurality of cutting blades canbe the blunt spine edge and the leading surface of the at least onecrushing blade can be the crushing blade face.

In accordance with an example embodiment of the present invention, ablender container can include a bottom section and one or more containerwalls extending upward from the bottom section and defining an interiorvolume of space forming a work chamber for processing one or more foodproducts. The one or more walls can terminate at a top section oppositethe bottom section and can have an opening providing access to the workchamber. The one or more container walls can include a plurality ofledge surface features sized, dimensioned, and oriented, in such a wayas to hinder vortex formation by food contents within the work chamberduring a blending operation.

In accordance with aspects of the present invention, each of theplurality of ledge surface features can include a surface having adecreasing radius of curvature as measured from a center point in thebottom section of the container terminating in an abrupt ledge whereinthe surface forms a corner and extends in a radially outward directionfrom the center point. The container further can include a lid sized anddimensioned to cover the opening in the top section when positioned ontop of the container.

In accordance with an example embodiment of the present invention, ablender system can include a blender container having a bottom sectionand one or more container walls extending upward from the bottom sectionand defining an interior volume of space forming a work chamber forprocessing one or more food products. The one or more walls canterminate at a top section opposite the bottom section and can have anopening providing access to the work chamber. The one or more containerwalls can include a plurality of ledge surface features sized,dimensioned, and oriented, to hinder vortex formation by food contentswithin the work chamber during a blending operation. The blender systemfurther can include a blade assembly comprised of a hub having a centralaxis about which the blade assembly rotates. A plurality of cuttingblades can extend radially outwardly from the hub, and each of thecutting blades can have a sharp cutting edge, a blunt spine edge, and acutting blade face therebetween. At least one crushing blade can extendlongitudinally outwardly from the hub. The at least one crushing bladecan have a first edge, a second edge, and a crushing blade facetherebetween. The plurality of cutting blades can be oriented in such away as to cause the sharp cutting edge of each blade to be a leadingsurface and the blunt spine edge to be a trailing surface when the hubrotates in a first direction, and the blunt spine edge of each blade tobe a leading surface and the sharp cutting edge to be a trailing surfacewhen the hub rotates in a second direction opposite the first direction.The at least one crushing blade can be oriented in such a way as tocause the crushing blade face to be a leading surface when the hubrotates in a first direction and a trailing surface when the hub rotatesin a second direction.

In accordance with aspects of the present invention, the blender systemfurther can include a motorized unit disposed in a base configured toreceive and couple with the container in such a way as to mechanicallycouple the motorized unit with the hub of the blade assembly to supplyrotational energy to the blade assembly.

In accordance with an example embodiment of the present invention, ablender system can include a container comprising a bottom section andone or more container walls extending upward from the bottom section anddefining an interior volume of space forming a work chamber forprocessing one or more food products. The one or more walls canterminate at a top section opposite the bottom section and having anopening providing access to the work chamber. A rotatable blade assemblycan be disposed in the work chamber and can be operable for processingfood contained within the work chamber through rotational action. Akeeper can be disposed in the top section. A slidable actuator shaft canextend between the bottom section and the top section and can beconfigured to slide between a first position and a second position. Alid can be sized and dimensioned to cover the opening in the top sectionwhen positioned on top of the container. The lid can include a hingedactuator lever with at least one locking tab sized, dimensioned, andoriented to engage with the keeper to mechanically lock the lid to thecontainer when pivoted from a first position to a second position. Thelid further can include a detent disposed in the hinged actuator leverand sized, dimensioned, and oriented to intersect with the slidableactuator shaft of the container when the lid is positioned on top of thecontainer and the hinged actuator lever is pivoted to the secondposition. The blender system can include a motorized unit disposed in abase configured to receive and couple with the container in such a wayas to mechanically couple the motorized unit with the blade assembly tosupply rotational energy thereto. The motorized unit can be activated bya mechanical switch. When the detent of the lid intersects with theslidable actuator shaft of the container, the slidable actuator shaftcan slide from the first position to the second position in such a wayas to mechanically intersect with and move the mechanical switch from anoff position to an on position, thereby activating the motorized unitand causing the blade assembly to rotate.

In accordance with aspects of the present invention, a spring force canbe applied to the slidable actuator shaft, which pushes the slidableactuator shaft generally toward the first position. A force applied bythe detent against the slidable actuator shaft can be sufficient inquantity so as to overcome the spring force and cause the slidableactuator shaft to move from the first position toward the secondposition. When the hinged actuator lever is pivoted away from the secondposition toward the first position, the detent no longer intersects withthe slidable actuator shaft and the spring force is sufficient inquantity to return the slidable actuator shaft to the first position.

BRIEF DESCRIPTION OF THE FIGURES

These and other characteristics of the present invention will be morefully understood by reference to the following detailed description inconjunction with the attached drawings, in which:

FIG. 1 is a perspective view of a blender system that includes acontainer having a slidable actuator shaft and a lid having a hingedactuator lever, according to an example embodiment of the presentinvention;

FIG. 2 is an upper perspective view of the lid of the blender system ofFIG. 1, according to aspects of the present invention;

FIG. 3 is a lower perspective view of the blender system of FIG. 1 withthe slidable actuator shaft and hinged actuator lever in respectivefirst positions, according to aspects of the present invention;

FIG. 4 is a first perspective view of the blender system of FIG. 1 withthe slidable actuator shaft and hinged actuator lever in respectivesecond positions, according to aspects of the present invention;

FIG. 5 is a second perspective view of the blender system of FIG. 1 withthe slidable actuator shaft arranged in the second position of FIG. 4,according to aspects of the present invention;

FIG. 6 is a perspective view of a base of the blender assembly of FIG. 1including a mechanical switch, according to an example embodiment of thepresent invention;

FIGS. 7A and 7B are perspective views of a hub supporting a rotatableblade assembly according to an example embodiment of the presentinvention;

FIG. 8 is a top view of the hub supporting the rotatable blade assemblyof FIGS. 7A and 7B, according to aspects of the present invention;

FIG. 9 is a first side view of the hub supporting the rotatable bladeassembly of FIGS. 7A and 7B, according to an example embodiment of thepresent invention;

FIG. 10 is a second side view of the hub supporting the rotatable bladeassembly of FIGS. 7A and 7B, according to aspects of the presentinvention;

FIG. 11 is a perspective view of a container adapted for use with therotatable blade assembly of FIGS. 7A through 10; and

FIG. 12 is a view of the container of FIG. 11 looking down along fromB-B, according to aspects of the present invention.

DETAILED DESCRIPTION

An illustrative embodiment of the present invention relates to a blendersystem. The blender system generally includes a container having arotatable blade assembly disposed therein, a lid covering an open topend of the container, and a base that houses a motorized unit. When thecontainer is coupled with the base, a mechanical coupling is establishedbetween the motorized unit and the rotatable blade assembly. Notably,the lid includes a hinged actuator lever adapted to actuate themotorized unit. For example, the hinged actuator lever can be moveable(e.g., by hinging or pivoting) from a first upright position to a secondflat position. When moved into the second flat position, a detentextending from the hinged actuator lever passes through a series ofapertures to engage a slidable actuator shaft disposed in the container.In particular, the detent can be caused to press against the slidableactuator shaft in such a way as to overcome a spring force maintainingthe slidable actuator shaft in a first position. While the detentremains pressed down against the slidable actuator shaft (e.g., by auser pressing the hinged actuator lever), the slidable actuator shaftremains in a second position. In the second position, an end portion ofthe slidable actuator shaft may extend beyond a bottom edge of thecontainer and move a mechanical switch on the base. Depressing theswitch causes the switch to move from an off position to an on position,thereby activating the motorized unit in the base to drive rotation ofthe rotatable blade assembly.

Furthermore, in accordance with another illustrative embodiment of thepresent invention, a rotatable blade system is provided. Notably, therotatable blade system includes a plurality of cutting blades, as wellas at least one crushing blade. The plurality of cutting blades canextend radially outward from a hub (e.g., an axle, etc.) adapted torotate about its central axis. The hub extends upward from a foundationthat is adapted to couple with (e.g., screw onto) a container of ablender assembly. The crushing blade can extend longitudinally outwardlyfrom the hub (e.g., vertically upward, as oriented in the manner shownin the figures). The crushing blade can be disposed at a position thatis higher up on hub than the position of the plurality of cuttingblades. When the hub is rotating in a first direction, the blades can beoriented such that (a) a sharp cutting edge on each of the plurality ofcutting blades is a leading surface and (b) a crushing blade face on thecrushing blade is a leading surface. In addition, when the hub isrotating in a second direction opposite the first direction, thisorientation of the blades can cause (a) a blunt spine edge on each ofthe plurality of cutting blades to be a leading surface and (b) thecrushing blade face on the crushing blade to be a trailing surface.

FIGS. 1 through 12, wherein like parts are designated by like referencenumerals throughout, illustrate example embodiments of a blender,according to the present invention. Although the present invention willbe described with reference to the example embodiments illustrated inthe figures, it should be understood that many alternative forms canembody the present invention. One of skill in the art will additionallyappreciate different ways to alter the parameters of the embodimentsdisclosed, such as the size, shape, or type of elements or materials, ina manner still in keeping with the spirit and scope of the presentinvention.

FIGS. 1 and 2 depict perspective views of a blender system 10 accordingto an example embodiment of the present invention. The blender system 10includes a container 12 adapted (e.g., sized and dimensioned) to receivefood products to be processed. In general, the blender system 10 can beadapted to perform any food processing or blending including asnon-limiting examples, dicing, chopping, cutting, slicing, mixing,blending, stirring, crushing, or the like. The container 12 generallyincludes a bottom section 14, a top section 16, and one or more walls 18extending between the bottom section 14 and the top section 16. The oneor more walls 18 define an interior volume of space forming a workchamber 20, within which food products are placed and processed. At thetop section 16 of the container 12 is an opening 22 that provides accessinto the work chamber 20 (e.g., by a user). The bottom section 14 isgenerally closed as depicted in the example embodiment if FIGS. 1 and 2,such that food products contained in the work chamber 20 are unable toescape the container 12 through the bottom section 14. Disposed withinthe work chamber 20 is a rotatable blade assembly 24 adapted tofacilitate processing and/or blending of food products. The container 12can include a handle 26 for facilitating transportation and manipulationof the container 12.

In addition to the container 12, the blender system 10 can also includea base 30 configured (e.g., sized, shaped, and arranged) to receive andcouple with the container 12. The base 30 can include a housing 31 amotorized unit (not visible in FIGS. 1 and 2) contained within thehousing. The base 30 can be adapted to couple with the container 12 insuch a way that the motorized unit and the rotatable blade assembly 24become mechanically coupled, and the motorized unit can be adapted todrive rotation of the rotatable blade assembly 24 once mechanicallycoupled thereto, as would be appreciated by those of skill in the art.

The container 12 can include a slidable actuator shaft 28 extendingbetween the bottom section 14 and the top section 16 and configured toslide between a first position and a second position. In the exampleembodiment of FIGS. 1 and 2, the first and second positions arecharacterized by different relative heights of the slidable actuatorshaft 28 (as oriented in FIGS. 1 and 2). More specifically, when in thefirst position, the slidable actuator shaft 28 of the example embodimentof FIGS. 1 and 2 is disposed at a relatively higher position (inrelation to the top and bottom sections 14, 16 of the container 12) thanwhen in the section position. Accordingly, moving the slidable actuatorshaft 28 into the second position from the first position causes theslidable actuator shaft 28 to be lowered away from the top section 16 ofthe container 12. As will be described in greater detail herein, thislowering movement of the slidable actuator shaft 28 can cause an endportion or the slidable actuator shaft 28 to engage and activate themotorized unit in the base 30 to drive rotation of the rotatable bladeassembly 24. For example, in some illustrative embodiments, thislowering movement of the slidable actuator shaft 28 causes an endportion of the slidable actuator shaft 28 to extend beyond the edge ofthe bottom section 14 of the container 12 and press against a mechanicalswitch on the motorized unit. Accordingly, the slidable actuator shaft28 can be housed in a compartment coupled to the one or more walls 18,and the compartment can be at least partially open on its bottom end,e.g., to allow the end portion of the slidable actuator shaft 28 to passtherethrough.

The blender system 10 can include a lid 32 sized and dimensioned tocover the opening 22 at the top section 16 of the container 12. The lid32 can include a pour spout 34, as illustrated in FIGS. 1 and 2. The lid32 additionally can include a hinged actuator lever 36 adapted to engagethe slidable actuator shaft 28 of the container 12. The hinged actuatorlever 36 is movable between (a) a first position in which the slidableactuator shaft 28 is not engaged (e.g., an upright position, as depictedin FIGS. 1 and 2) and (b) a second position in which the slidableactuator shaft 28 is engaged (e.g., a flat position, as depicted in FIG.5). In accordance with illustrative embodiments of the presentinvention, engaging the slidable actuator shaft 28 activates themotorized unit in the base 30, as described in greater detail herein.

The hinged actuator lever 36 can include at least one locking tab 38(e.g., two are included in the example embodiment of FIGS. 1 and 2) thatis sized, dimensioned, and orientated to engage with a keeper 40disposed in the top section 16 of the container 12 (e.g., and extendingfrom the one or more walls 18 of the container 12). More specifically,the locking tab 38 is adapted to engage with the keeper 40 tomechanically lock the lid 32 to the container 12 when the hingedactuator lever 36 is pivoted from the first position to the secondposition. For example, the keeper 40 can be shaped as a semi-circulartrack protruding from an exterior side of the one or more walls 18, andthe locking tab 38 can be shaped as a corresponding semi-circularprotrusion that slides beneath the keeper 40 and presses up against thekeeper 40 when the hinged actuator lever 36 is moved into the secondposition. In this way, the combined locking effect of the locking tab 38and the keeper 40 prevents the lid 32 from lifting up and becomingremoved from the container 12 when the hinged actuator lever 36 is inthe second position and the motorized unit is driving rotation of therotatable blade assembly 24.

The lid 32 also can include detent 39 extending from the hinged actuatorlever 36. The detent 39 can be sized and positioned to engage theslidable actuator shaft 28 of the container 12 and to cause the slidableactuator shaft 28 to move from its first position to its secondposition. In particular, the lid 32 can include an aperture 42 disposedtherein and therethrough. The container 12 likewise can include anaperture 46 disposed therein and therethrough. The aperture 46 in thecontainer 12 can lead directly to a compartment housing the slidableactuator shaft 28. Furthermore, when the lid 32 is properly coupled tothe container 12, the apertures 42, 46 are aligned and overlapping.Accordingly, the detent 39 can be sized and positioned on the hingedactuator lever 36 in such a way that moving the hinged actuator lever 36into the second position causes the detent 39 to pass through theapertures 42, 46 and to press down on the slidable actuator shaft 28. Inthis way, a user controlling the hinged actuator lever 36 is able tocause the slidable actuator shaft 28 to move into the second position,thereby triggering the motorized unit to drive rotation of the rotatableblade assembly 24.

One or more spring-loaded pins 44 (e.g., two are included in the exampleembodiment of FIGS. 1 and 2) can be disposed on and can extend from thehinged actuator lever 36. When the hinged actuator lever 36 is in thefirst position and the detent 39 is not engaging the slidable actuatorshaft 28, the spring-loaded pins 44 are in a natural, uncompressed andnon-retracted position. When the hinged actuator lever 36 is moved intothe second position, the spring-loaded pins 44 are caused to pressagainst a surface of the lid 32 and, as a result, retract. Thisgenerates a spring force in the spring-loaded pins 44, which tends topush the hinged actuator lever 36 out of the second position, absent theforce applied by the user to the hinged actuator lever 36. Thus, in suchembodiments, for a user to maintain the hinged actuator lever 36 in thesecond position (during which time the rotatable blade assembly 24 isspinning) the user must apply and maintain a force against the hingedactuator lever 36. This can be beneficial, for example, in preventingunwanted or accidental activation of the rotatable blade assembly 24 dueto a user forgetting or inadvertently failing to move the hingedactuator lever 36 from the second position back into the first position.Alternatively to the illustrative embodiment of FIGS. 1 and 2, the oneor more spring-loaded pins 44 can be positioned on the flat surface ofthe lid 32 which receives the hinged actuator lever 36, as would beappreciated by one of skill in the art upon reading the presentspecification. Furthermore, in some embodiments, the spring-loaded pins44 are not included in the lid 32.

FIG. 3 depicts a side view of the container 12 with the lid 32 disposedthereon with the slidable actuator shaft 28 and hinged actuator lever 36in their respective first positions. As shown, in this exampleembodiment, the slidable actuator shaft 28 does not extend beyond thebottom edge of the container 12 when the slidable actuator shaft 28 isin its first position. Accordingly, the slidable actuator shaft 28 canbe spring-loaded to naturally remain in the first position (e.g., canremain in the first position in the absence of a downward force on theslidable actuator shaft 28 that is larger than the force of the springsystem maintaining the slidable actuator shaft 28 in the firstposition). Stated differently, a spring force is applied to the slidableactuator shaft 28 which tends to push the slidable actuator shaft 28generally toward the first position. Accordingly, to overcome the springforce and maintain the slidable actuator shaft 28 in the secondposition, a user may press down against the hinged actuator lever 36with a force that is greater than the spring force applied to theslidable actuator shaft 28.

Reference is now made to FIGS. 4 and 5, which show side views of thecontainer 12 with the lid 32 disposed thereon and the slidable actuatorshaft 28 and hinged actuator lever 36 in their respective secondpositions. As depicted in FIGS. 4 and 5, a user can maintain the hingedactuator lever 36 in its second position by applying a pressure againstthe hinged actuator lever 36. This causes the hinged actuator lever 36to engage with and press down upon the slidable actuator shaft 28. Theslidable actuator shaft 28, as a result, is moved into its secondposition, causing an end portion 48 thereof to extend beyond the bottomedge of the container 12, thereby enabling it to activate the motorizedunit. Furthermore, when the hinged actuator lever 36 is pivoted awayfrom its second position back toward its first position, the detent 39no longer intersects with the slidable actuator shaft 28 and the springforce is sufficient in quantity to return the slidable actuator shaft 28to its first position.

More specifically, in illustrative embodiments, the motorized unit inthe base 30 includes a mechanical switch that is adapted to be depressedby the end portion 48 of the slidable actuator shaft 28 when theslidable actuator shaft 28 is in the second position. For example, FIG.6 depicts a perspective view of the base 30 of the blender system 10including such a mechanical switch 50. The switch 50 is positioned to bedirectly beneath the slidable actuator shaft 28 when the container 12 iscoupled to the base 30. Furthermore, the switch 50 of the motorized unitis directly exposed to the slidable actuator shaft 28. Accordingly,coupling the container 12 with the base 30 and moving the hingedactuator lever 36 into its second position causes the end portion 48 ofthe slidable actuator shaft 28 to extend downward and mechanicallyintersect and move the switch 50 from an off position to an on position.Depressing the switch 50 in this way activates the motorized unit withinthe base 30 to drive rotation of the rotatable blade assembly 24.Accordingly, processing of food products contained within the workchamber 20 can be conveniently commenced and halted through simplecontrol and manipulation of the hinged actuator lever 36.

As further illustrated in FIG. 6, the base 30 can also include a gearunit 51 surrounded by a cylindrical wall 55 forming a volume of spaceadapted to receive the container 12 (e.g., or some portion thereof orconstituent component coupled thereto). The gear unit 51 is coupled,within the base, to the motorized unit. The gear unit 51 further isadapted to mechanically couple with the rotatable blade assembly 24 whenthe container 12 is coupled with the base 30, as would be appreciated byone of skill in the art upon reading the present specification. Thismechanical coupling between the gear unit 51 and the rotatable bladeassembly 24 enables the motorized unit to drive rotation of therotatable blade assembly 24, e.g., by way of the gear unit 51. Inaddition to the gear unit 51, the base 30 optionally can also include aplurality of recesses (not shown) for receiving longitudinal tabs (notshown) disposed along the length of the container 12, as would beappreciated by one of skill in the art upon reading the presentspecification. The longitudinal tabs (not shown) may function as guidesto ensure that the container 12 is complementarily and properly receivedby the base 30.

In accordance with some alternative embodiments of the presentinvention, the switch 50 can include a portion that extends upward intoa compartment housing the slidable actuator shaft 28. In suchalternative embodiments, activation of the motorized unit does notrequire that the end portion 48 of the slidable actuator shaft 28 extendbeyond the bottom edge of the container 12 when the slidable actuatorshaft 28 is in the second position.

In accordance with some embodiments of the present invention, pulsedprocessing of food products may occur by periodic or intermittentcontrol and manipulation of the hinged actuator lever 36. In otherembodiments, an external lock (not shown) may be included adjacent thehinged actuator lever 36 of the lid 32 to restrict the blender system 10to continuous, non-intermittent operation.

In general, the rotatable blade assembly 24 can be any suitable orconventional blade assembly, as would be appreciated by one of skill inthe art. However, in accordance with certain further illustrativeembodiments of the present invention, the rotatable blade assembly 24can be implemented using a novel rotatable blade assembly 24′, whichwill now be described with reference to FIGS. 7A through 10. Althoughthe novel rotatable blade assembly 24′ is described herein withreference to operation with and inclusion in the illustrative blendersystem 10 of FIGS. 1 and 2, it should be understood that the rotatableblade assembly 24′ alternatively can be a stand-alone device and/or canbe included in other any conventional or suitable blender assembly notdescribed or depicted herein. In accordance with aspects of the presentinvention, the rotatable blade assembly 24′ is not limited to use orinclusion with the illustrative blender system 10 of FIGS. 1 and 2, orwith any other blender assembly.

FIGS. 7A and 7B depict perspective views of a hub 52 supporting arotatable blade assembly 24′ in accordance with a further illustrativeembodiment of the present invention. In the example embodiment of FIGS.7A and 7B, the hub 52 is a generally cylindrical axle. However, the hub52 alternatively may be implemented using any other suitable shapeand/or structure (e.g., conical, etc.). The hub 52 has a central axis 57about which the rotatable blade assembly 24′ is adapted to rotate.

The hub 52 extends upward from a foundation 53 adapted to couple withthe container 12 at the bottom section 14, e.g., by screwing onto thebottom section 14. Specifically, the foundation 53 may include interiorthreads 72 enabling the foundation 53 to be screwed onto the bottomsection 14 of the container 12. Furthermore, the foundation 53 mayinclude a gasket (not shown) adjacent the interior threads 72 to ensurethat a substantially complete seal is formed when the foundation 53 iscoupled to the container 12.

The rotatable blade assembly 24′ generally includes a plurality ofcutting blades 54 a-d extending radially outward from the hub 52. Eachof the cutting blades 54 a-d has a sharp cutting edge 56, a blunt spineedge 58, and a cutting blade face 60 therebetween. In general, two ormore of the cutting blades 54 a-d may be included in pairs. Furthermore,one or more of the cutting blades 54 a-d generally can extend bothradially outward from the hub 52 and longitudinally upward orlongitudinally downward along the hub 52. For example, in accordancewith the embodiment of FIGS. 7A and 7B, the cutting blades 54 a-d caninclude a first pair of opposing cutting blades 54 a, 54 b extendingradially outward from the hub 52 and longitudinally downward along thehub 52, as well as a second pair of opposing cutting blades 54 c, 54 dextending radially outward from the hub 52 and longitudinally upwardalong the hub 52. The first pair of opposing cutting blades 54 a, 54 bare “opposing” in that they are disposed around the hub 52 separated byan angular displacement of about 180 degrees. The second pair ofopposing cutting blades 54 c, 54 d likewise are “opposing” in that theyare disposed around the hub 52 separated by an angular displacement ofabout 180 degrees. As depicted in FIGS. 7A and 7B, the first pair ofopposing cutting blades 54 a, 54 b and the second pairs of opposingcutting blades 54 c, 54 d are disposed around the hub 52 separated fromeach other by an angular displacement of about 90 degrees.

Although four cutting blades 54 a-d are depicted in the exampleembodiment of FIGS. 7A and 7B, it should be appreciated that any othernumber of cutting blades 54 a-d (e.g., one, two, three, five, six, etc.)alternatively can be included in the rotatable blade assembly 24′.Furthermore, although the cutting blades 54 a-d are generally separatedby about 90 degree increments in the example embodiment of FIGS. 7A and7B, it should be appreciated that the cutting blades 54 a-dalternatively can be separated by any other suitable amount(s), whichmay be a uniform or variable amount among the plurality of cuttingblades 54 a-d.

In addition to the cutting blades 54 a-d, the rotatable blade assembly24′ can include at least one crushing blade 62 extending longitudinallyoutwardly from the hub 52 (e.g., vertically upward, as oriented in FIGS.7A and 7B). Each crushing blade 62 has a first edge 64, a second edge66, and a crushing blade face 68 therebetween. In the example embodimentof FIGS. 7A and 7B, two crushing blades 62 are disposed around the hub52 separated by an angular displacement of about 90 degrees. The twocrushing blades 62 are substantially parallel to each other, asdepicted. The crushing blade face 68 of each crushing blade 62 can besubstantially flat and can be oriented to be substantially perpendicularto a tangent line drawn from the central axis 57 to the point halfwaybetween the first and second edges 64, 66, as depicted in FIGS. 7A and7B. Each of the crushing blades 62 can have a top edge that is sloped(e.g., by 45 degrees, or any other amount) relative to a planecontaining a direction of rotation of the rotatable blade assembly 24′.It should be noted that the first edge 64 and second edge 66 representsmaller dimensions of the blade, while the crushing blade face 68 is arelatively substantially greater dimension, as would be interpreted inaccordance with the customary labels for these parts of a knife blade orsimilar structure.

The hub 52 can be adapted to rotate a first direction (e.g., clockwise)as well as a second direction opposite the first direction (e.g.,counterclockwise). For purposes of illustration and clarity of thepresent description, in various examples provided herein the firstdirection is referred to as being clockwise and the second direction isreferred to as being counterclockwise. However, it should be appreciatedthat the first direction alternatively can be counterclockwise and thesecond direction alternatively can be clockwise.

In accordance with the example embodiment of FIGS. 7A and 7B, thecutting blades 54 are all oriented in such a way that when the hub 52rotates in the first directions (e.g., clockwise), the sharp cuttingedge 56 of each cutting blade 54 is a leading surface and the bluntspine edge 58 of each cutting blade 54 is a trailing surface. Furtherdue to this illustrative orientation of the cutting blades 54, when thehub 52 rotates in the second direction (e.g., counterclockwise), theblunt spine edge 58 of each cutting blade 54 is a leading surface andthe sharp cutting edge 56 of each cutting blade 54 is a trailingsurface. A “leading surface,” as used herein, generally refers to asurface of an object that is first to be impacted (e.g., by foodproducts contained in the work chamber 20) during rotation of the objectin a manner tending to crush the food product. Furthermore, a “trailingsurface” generally refers a surface opposite or following the leadingsurface as it moves. Furthermore, a “surface” can be either a narrowedge, or can be a wider face, of the blade structure.

Each crushing blade 62 can be oriented in such a way that its crushingblade face 68 is a leading surface when the hub 52 rotates in the firstdirection (e.g., clockwise) and a trailing surface when the hub 52rotates in the second of the two opposite directions (e.g.,counterclockwise). For example, FIG. 8 depicts a top view of thecrushing blades 62. As shown, when the hub 52 rotates in “direction A”(e.g., counterclockwise), the rearward portion of the crushing blade 62(e.g., relative to the direction of motion) is a leading surface whichimpacts and makes direct contact with the food products a mannerenabling the food products to be crushed. The frontward portion of thecrushing blades 62 (e.g., relative to the direction of motion), which isopposite and follows behind the rearward portion, is a trailing surface.

Since the crushing blades 62 extend longitudinally outwardly from thehub 52 (that is, longitudinal being a direction generally parallel tothe central axis 57 about which the hub 52 rotates), food productscontacting the crushing blades 62 during rotation of the hub 52 will bestruck by the rearward half (relative to the direction of rotation) ofthe crushing blades 62, e.g., the leading surface as depicted in FIG. 8.Specifically, given the angle at which the rearward half of the crushingblades 62 will impact the food products, the food products willexperience a blunt force exerted by the, e.g., substantially flatcrushing blade face 68 which will tend to break up (e.g., crush) theimpacted food products.

Reference is now made to FIGS. 9 and 10, which depict side views of therotatable blade assembly 24′ of the example embodiment of FIGS. 7A, 7Band 8. In general, one, some, or all of the cutting blades 54 a-54 d caneach optionally have some curvature in the respective cutting blade face60 (e.g., may curve longitudinally downward or upward). The curvaturecan be useful, for example, in generating a sphere-like mixing effect.For example, the cutting blade 54 a can have a first radius of curvatureand the opposing cutting blade 54 b has a second radius of curvature;and the second radius of curvature of the opposing cutting blade 54 bcan be smaller than, greater than, or equal to the first radius ofcurvature. Furthermore, the cutting blade 54 c can have a third radiusof curvature and the opposing cutting blade 54 d can have a fourthradius of curvature; and the fourth radius of curvature may be greaterthan, less than, or equal to the third radius of curvature.

As described previously herein, as each of the cutting blades 54 a-d canextend both radially outward from the hub 52 and longitudinally upwardor longitudinally downward along the hub 52, each of the cutting blades54 a-d can be disposed at an angle relative to a plane containing thedirection of rotation of the hub 52 (e.g., relative to the horizontal,as oriented in FIGS. 9 and 10). For example, in accordance with theexample embodiment of FIGS. 9 and 10, the cutting blades 54 a, 54 b canbe disposed at an angle θ away from a plane containing (a) a directionof rotation of the hub 52, (b) the point of connection between the hub52 and the cutting blade 54 a, and (c) the point of connection betweenthe hub 52 and the cutting blade 54 b. The angle θ thus indicates theslope in the cutting blades 54 a, 54 b and generally can be about 45degrees, or any other suitable angle (e.g., greater or less than 45degrees). Furthermore, the cutting blades 54 a, 54 b need not be slopedat the same angle θ as each other. Similarly, the cutting blades 54 c,54 d can be disposed at an angle φ away from a plane containing (a) adirection of rotation of the hub 52, (b) the point of connection betweenthe hub 52 and the cutting blade 52 c, and (c) the point of connectionbetween the hub 52 and the cutting blade 52 d. The angle φ thusindicates the slope in the cutting blades 54 c, 54 d relative to theplane containing a direction of rotation of the hub 52. The angle φgenerally can be about 45 degrees, or any other suitable angle (e.g.,greater or less than 45 degrees). Furthermore, the cutting blades 54 c,54 d need not be sloped at the same angle φ as each other.

FIG. 11 depicts an example embodiment of the container 12 adapted foruse with the rotatable blade assembly 24′ of FIGS. 7A, 7B and 8. FIG. 12further depicts a view of the container 12 of FIG. 11 looking down onthe bottom section 14 from line B-B in FIG. 11. As shown in FIG. 11, thecontainer 12 can include interior threads 80 formed in the top section16, for enabling the container 12 to couple with the lid 32.Additionally or alternatively, the container 12 can include interiorthreads (not shown) formed in the bottom section 14 of the container,for enabling the container 12 to couple with the foundation 53 by matingwith the interior threads 72 of the foundation 53. Although the interiorthreads 80 are shown, it should be appreciated that exterior threads, orany other suitable coupling mechanism, alternatively or additionally maybe included to enable coupling between the container 12 and thefoundation 53.

As depicted in FIGS. 11 and 12, the container 12 optionally may includea plurality of ledge surface features 76 adapted to facilitate theprocessing of food products. The plurality of ledge surface features 76may extend from an interior face of the bottom section 14 inward towarda center of the bottom section 14. The ledge surface features 76 can besized, dimensioned, and oriented, in such a way as to hinder vortexformation by food contents within the work chamber 20 during a blendingoperation. For example, each of the plurality of ledge surface features76 can include a surface that curves inward and which has a decreasingradius of curvature as measured from a center point 87 of the bottomsection 14. Each of the plurality of ledge surface features 76additionally can terminate in an abrupt ledge 77, at which point thesurface extends from an interior face of the bottom section 14 radiallyinward toward the center 87 of the bottom section 14, e.g., to form acorner jutting into the work chamber 20.

Beneficially, disrupting a vortex in this way can help improveprocessing the food products by allowing the food products to be morethoroughly mixed. As would be appreciated by one of skill in the art,the presence of a vortex in the work chamber 20 can decrease thethoroughness with which food products are mixed and exposed to therotatable blade assembly 24. Stated differently, vortexes increase thelikelihood of at least some food products bypassing the food processingfunctions of the blender system 10, e.g., by becoming lodged away orstuck near the outer perimeter of the vortex away from the rotatableblade assembly 24. Furthermore, the interior of the container 12 mayinclude a plurality of ribs (not shown) adapted to facilitate theprocessing of food products in the work chamber 20 similarly bydisrupting the formation or the presence of vortexes within the workchamber during operation of the rotatable blade assembly 24.

In addition to coupling with the container 12, the foundation 53 furthercan be adapted to couple with the base 30, as will now be described. Theunderside of the foundation 53 generally may be sized and shaped to fitsecurely within the volume of space defined by the cylindrical wall 55of the base 30. Furthermore, the foundation 53 additionally may includea gear unit adapted to drive rotation of the rotatable blade assembly24′. For example, the gear unit can be coupled to the rotatable bladeassembly 24′ by one or more interior axles, rods, etc. The gear unitfurther can be adapted to mechanically couple with the gear unit 51 ofthe base 30, e.g., and can engage with the gear unit 51 of the base 30once the bottom section 14 of the container 12 with the foundation 53included therein is placed onto the base 30. Accordingly, rotation ofthe gear unit 51 of the base 30 can cause the gear unit of thefoundation 53 to rotate, thereby causing the rotatable blade assembly24′ to rotate.

Numerous modifications and alternative embodiments of the presentinvention will be apparent to those skilled in the art in view of theforegoing description. Accordingly, this description is to be construedas illustrative only and is for the purpose of teaching those skilled inthe art the best mode for carrying out the present invention. Details ofthe structure may vary substantially without departing from the spiritof the present invention, and exclusive use of all modifications thatcome within the scope of the appended claims is reserved. It is intendedthat the present invention be limited only to the extent required by theappended claims and the applicable rules of law.

It is also to be understood that the following claims are to cover allgeneric and specific features of the invention described herein, and allstatements of the scope of the invention which, as a matter of language,might be said to fall therebetween.

What is claimed is:
 1. A blade assembly for a blender, comprising: a hubhaving a central axis about which the blade assembly rotates; aplurality of cutting blades extending radially outwardly from the hub,each of the plurality of cutting blades having a sharp cutting edge, ablunt spine edge, and a cutting blade face therebetween; at least onecrushing blade extending vertically upwardly in a direction parallel tothe central axis from the hub, the at least one crushing blade having afirst edge, a second edge, and a crushing blade face therebetween; theplurality of cutting blades oriented such that the sharp cutting edge ofeach cutting blade of the plurality of cutting blades is a leadingsurface and the blunt spine edge of each cutting blade of the pluralityof cutting blades is a trailing surface when the hub rotates in a firstdirection about the central axis, and the blunt spine edge of eachcutting blade of the plurality of cutting blades is the leading surfaceand the sharp cutting edge of each cutting blade of the plurality ofcutting blades is the trailing surface when the hub rotates in a seconddirection opposite the first direction about the central axis; and theat least one crushing blade oriented such that the crushing blade faceis a leading surface when the hub rotates in a first direction about thecentral axis and a trailing surface when the hub rotates in a seconddirection about the central axis.
 2. The blade assembly of claim 1,wherein each sharp cutting edge is sharper than each blunt spine edge.3. The blade assembly of claim 1, wherein the sharp cutting edge of afirst of the plurality of cutting blades has a first radius of curvatureand the sharp cutting edge of a second of the plurality of cuttingblades has a second radius of curvature, the second radius of curvaturebeing smaller than the first radius of curvature.
 4. The blade assemblyof claim 3, wherein the sharp cutting edge of a third of the pluralityof cutting blades has a third radius of curvature and the sharp cuttingedge of a fourth of the plurality of cutting blades has a fourth radiusof curvature, the fourth radius of curvature being smaller than thethird radius of curvature.
 5. The blade assembly of claim 1, wherein theblade assembly is operable to crush food products with the leadingsurface of the at least one crushing blade when the hub rotates aboutthe central axis.
 6. The blade assembly of claim 1, wherein when the hubis rotating in a first direction, the leading surface of at least one ofthe plurality of cutting blades is the sharp cutting edge and theleading surface of the at least one crushing blade is the crushing bladeface.
 7. The blade assembly of claim 1, wherein when the hub is rotatingin a first direction the leading surface of at least one of theplurality of cutting blades is the blunt spine edge and the leadingsurface of the at least one crushing blade is the crushing blade face.8. A blender system, comprising: a blender container, comprising: abottom section; and one or more container walls extending upward fromthe bottom section and defining an interior volume of space forming awork chamber for processing one or more food products, the one or morewalls terminating at a top section opposite the bottom section andhaving an opening providing access to the work chamber; wherein the oneor more container walls include a plurality of ledge surface featuressized, dimensioned, and oriented, to hinder vortex formation by foodcontents within the work chamber during a blending operation; and ablade assembly, comprising: a hub having a central axis about which theblade assembly rotates; a plurality of cutting blades extending radiallyoutwardly from the hub, each of the cutting blades having a sharpcutting edge, a blunt spine edge, and a cutting blade face therebetween;at least one crushing blade extending vertically upwardly in a directionparallel to the central axis, the at least one crushing blade having afirst edge, a second edge, and a crushing blade face therebetween; theplurality of cutting blades oriented in such a way as to cause the sharpcutting edge of each blade to be a leading surface and the blunt spineedge to be a trailing surface when the hub rotates in a first direction,and the blunt spine edge of each blade to be a leading surface and thesharp cutting edge to be a trailing surface when the hub rotates in asecond direction opposite the first direction; and the at least onecrushing blade oriented in such a way as to cause the crushing bladeface to be a leading surface when the hub rotates in a first directionand a trailing surface when the hub rotates in a second direction. 9.The blender system of claim 8, further comprising: a motorized unitdisposed in a base configured to receive and couple with the containerin such a way as to mechanically couple the motorized unit with the hubof the blade assembly to supply rotational energy to the blade assembly.